Improvement in vibrating colters for plows



' 2 shows a top view of the same.

UNITED STATES PATENT OFFICE.

JOHN S. JOHNSTON, OF ROCKFORD, ILLINOIS.

IMPROVEMENT IN VIBRATING COLTERS FOR PLOW S.

Specification forming part of Letters Patent No. 101,739, dated April 12, 187i); antedated April 1, 1870:

To all whom it may concern.-

Be it known that I, J. S. JOHNSTON, of Rockford, in the county of YVinnebago and State of Illinois, have invented a new and useful Vibrating Oolter for Flows; and I do hereby declare that the following is a full, clear, and exact description of the construction and operation of the same, reference being had to the annexed drawings, forming part of this specification, and to the letters of reference marked thereon.

In the drawings, Figure 1 shows a side view of the device attached to a plow-beam. Fig. Fig. 3 shows an end view of the beam with the colter attached.

My invention has reference to the production of a vibrating colter for plows; and it consists of certain combinations of devices hereinafter to be set forth.

In the drawings, A is the plow-beam, which is clasped by the plates B B, held firmly in position by the bolts aa. The vibrating plate 0 is hinged to the beam A by the bolt to and moves between the plates B B. The socket b of vibrating; plate 0 receives the colter-yoke D and is held secure by the set-screw e. The colter E moves between the forked ends of the colter-yoke, rotating upon the pin (1. The regulating-screwsfg pass through the vibrating plate 0 and are used in adjusting the movements of the colter, as hereinafter to be set forth. The spiral spring at keeps the vibrating plate 0 pressed against the plate B.

In this invention especial attention is asked to the following among other points:

First. The difference in the size of plowbeams renders it necessary in constructing colters to provide for adjusting them to different dimensions of width and depth of the plowbeam. The slotted holes in plates B B permit beams of different widths to be used, while the spiral spring at, on bolt a, under the vibrating plate 0, always keeps said plate pressed against plateB, and the length of the screw on the bolts a a compensates for the difference in the depth of the beams.

Second. ThevibratingplateO,movingon the bolt a, is adjusted in its vibrating movement by the regulating-screws fg. By running the screws forward or backward the amount of vibration is limited, while, if it is desired to set the colter so as to run to land, the screwf is run forward, so that the front edge of the colter inclines somewhat to land, and if it is desired to run the colter away from land screw gmust be run forward farther than the other screw.

'It will also be readily seen that when both screws are run forward to the beam A the colter remains fixed, so far as any vibrating movement is concerned. We have, therefore, in this arrangement a colter vibrating on each side of the line of draft, a colter vibrating only on either side, as agreed upon, and a fixed colter readily adjusted either to or from the land.

Third. ThecolterEisheld in positionon the shaft d by the washers h h, which are of unequal thickness, and hence by reversing them the colter-plate is moved to the position desired with reference to the plow. Instead of two unequal washers, as here shown, a series of washers can be used, making this adjustment as close as desired.

Having thus described my devices, what I claim as myinvention, and desire to secure by Letters Patent, is-- 1. The combination and arrangement of the slotted plates B B, bolts a a, vibrating plate 0, and spring m, the whole constructed and operating substantially as and for the purpose set forth.

2. The combination of the vibrating plate 0, regulating-screws f g, and colter E, the whole arranged to operate substantially as specified.

JOHN S. JOHNSTON.

Witnesses:

OYRUs F. MILLER, W. W. BURsoN. 

